Bests & Worsts Reviews from Amazon

Decent travel mug, but the cap can be tricky. If you don't push down on the cap while twisting, it will leak. Also, it IS possible to open the snap seal while holding with one hand (use your thumb or index finger). Keeps drinks hot/warm for several hours. UPDATE: NEW LID! (See Pic: Old Lid (left) vs. New Lid (right)). I was contacted by Contigo regarding my concerns about the lid. Fortunately, they offered to replace my mug free of charge with a NEW lid (hooray lifetime warranty!). The newer lid has a different design on the interior and is EASIER to screw on than the old lid. Also, the spout opens wider so that more liquid pours out whereas the old spout only opened a little bit.